A communication apparatus configured to contactlessly communicate a baseband signal to another communication apparatus includes a transmission unit configured to stop output of a transmission signal, which is to be transmitted to the other communication apparatus, while a reception intensity of a reception signal received from the other communication apparatus is lower than a first threshold value, and a transmission coupler configured to be coupled to a reception coupler of the other communication apparatus by electric field coupling.

Data isolators are described. The data isolators include a differential receiver having cross-coupled single-ended amplifiers. The single-ended amplifiers may be referenced to a time-varying reference potential. The cross-coupling of the single-ended amplifiers may provide high speed, low power consumption operation of the data isolator.

A transmitting/receiving device for a bus system and a method for reducing an oscillation tendency in the transition between different bit states. The transmitting/receiving device has a transmitting stage for transmitting a transmission signal to a first bus wire of a bus of the bus system and for transmitting the transmission signal as an inverse signal to a second bus wire of the bus, and an asymmetry reduction module for reducing an asymmetry of bus signals arising in the bus wires. The asymmetry reduction module includes a polarity reversing diode, whose cathode is connected to the cathode of a reverse polarity diode of the transmitting stage. The asymmetry reduction module switches a potential of the cathode of the polarity reversing diode to a potential that is greater than or equal to a level of a recessive bus state.

A transceiver includes a transmitter and a receiver connected to each other by a first line and a second line. The transmitter transmits signals having a first voltage range to the first line and the second line in a first mode, and transmits signals having a second voltage range smaller than the first voltage range to the first line and the second line in a second mode. The transmitter encodes an original payload in the second mode to generate a first payload, and transmits the clock training pattern and the first payload through the first line and the second line.

A transceiver includes a transmitter and a receiver connected to each other through a first line and a second line. The transmitter transmits signals having a first voltage range to the first line and the second line in a first mode, and transmits signals having a second voltage range less than the first voltage range to the first line and the second line in a second mode. When transmitting a first payload to the receiver, the transmitter is sequentially driven in the first mode, the second mode, and the first mode, and the transmitter transmits a clock training pattern and the first payload in the second mode.

A transceiver for a CAN bus system and a method for detecting a short circuit using a CAN transceiver. The transceiver includes a transmitter for transmitting a transmission signal to a first bus wire of a bus of the bus system, exclusive, collision-free access to the bus of the bus system of a user station being at least temporarily ensured in the bus system, and for transmitting the transmission signal to a second bus wire of the bus, a receiver for receiving the bus signal transmitted on the bus wires, and a diagnostic unit for detecting a short circuit in the bus system, the diagnostic unit being designed to carry out a diagnosis only in a predetermined communication phase of the bus signal.

Embodiments of the present application provide an optical line terminal line card and a method compatible with a PON function. The optical line terminal line card includes an optical module, a MAC module, a toggle switch, a switch controller, a series resistor and a pull-down resistor. The optical module is connected to the MAC module to form a first connection line, the series resistor is provided on a side of the first connection line close to the optical module and on the first connection line, the pull-down resistor is connected to the first connection line by means of a second connection line, the toggle switch is provided on the second connection line and is located between the first connection line and the pull-down resistor, and the switch controller is connected to the optical module and the toggle switch, respectively.

Isolated circuit systems are provided. The systems include a primary side circuit and a secondary circuit, electrically isolated from each other. The primary side and secondary side circuits each utilize a direct current (DC) reference signal. The primary side circuit may use the DC reference signal in a modulation operation. The secondary side circuit may use the DC reference signal in a demodulation operation. The DC reference signal may be sent from the primary side circuit to the secondary side circuit, or from the secondary side circuit to the primary side circuit.

The present disclosure provides a method for transmitting and receiving in a wireless communication system and an apparatus therefore. Specifically, in a wireless communication system according to an embodiment of the present disclosure, there is provided a method for transmitting and receiving a signal by a receiving apparatus, the method includes receiving, from a transmitting apparatus, signals modulated based on a differential phase shift keying (DPSK) method through a plurality of reception paths, calculating a differential value in each reception path of the plurality of reception paths based on the received signals, and calculating reliability for the received signals, in which the reliability is proportional to a real value of a sum of the differential values in each reception path of the plurality of reception paths.

Circuits and techniques are described for high-speed transceivers (e.g., repeaters such as re-drivers or re-timers) that ensure that the instantaneous voltage at an input or output of a connected device remains within a desired or specified voltage range.